I definitely notice more zip in webpage display inside Chrome and I am able to sustain higher throughputs on various speed tests compared to before. After over a year of using these settings on 10.6 Snow Leopard and the past year plus on 10.8 Mountain Lion, I can report that all local applications and systems are running well. I have not been able to recreate any of the strange side effects, yet, with these updates. I believe that most issues were caused by the aggressive TCP keepalive timers. I have attempted to provide an update to address certain strange connectivity behaviors. This post has generated a fair amount of feedback, due to issues encountered. The above document was a great reference to bookmark, but I thought I would also include my own thoughts on this topic to shed some additional light on the subject. Thank you to martineau(at) for pointing this out. For now, you can at least find it in the Wayback Machine archive here. The closest thing I have found to a full discussion and tutorial on the topic can be found here. You can also find my latest updates for High Sierra and Mojave in my most recent post here. Here is a link to my latest post on performance tuning the network stack on OSX Mavericks 10.9. ![]() Updates for 10.9 Mavericks are mostly minor. ![]() This document applies to OSX 10.5 Leopard, 10.6 Snow Leopard, 10.7 Lion, and 10.8 Mountain Lion. So, the configuration should be addressed with that in mind. Many of the parameters are dependent upon others. However, most of these documents either provide basic suggestions without much background on a particular setting or they discuss some of the implications of changing certain parameters but don’t give you very solid guidance or recommendations on the best configuration in a particular scenario. There is a decent amount of documentation out there that details all of the tunable parameters on the Mac OSX IP stack.
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